Preferential tariff exemption for crude petroleum imports from Brunei Darussalam conditional on proof of origin under ASEAN-India rules. Provides a preferential tariff exemption reducing customs duty on imports of crude petroleum oils from Brunei Darussalam, subject to a specified reduced ad valorem charge, and conditions the exemption on importer proof of Brunei origin in accordance with the Determination of Origin rules under the ASEAN-India Preferential Trade Agreement, with verification by the Deputy or Assistant Commissioner of Customs.